A chalk sample exactly 17.52 gram HCl for complete reaction with all `CaCO_(3)` present in it. If the chalk sample is 72% pure, the mass of sample taken is
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AI Generated Solution
To solve the problem step by step, we need to find the mass of the chalk sample based on the amount of HCl required for the reaction with calcium carbonate (CaCO₃) and the purity of the chalk sample.
### Step 1: Calculate the moles of HCl used
We know that the mass of HCl used is 17.52 grams. The molecular weight of HCl is calculated as follows:
- H (Hydrogen) = 1 g/mol
- Cl (Chlorine) = 35.5 g/mol
- Molecular weight of HCl = 1 + 35.5 = 36.5 g/mol
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